ExplainerG Prime, Explained: The One Number That Decides How Your Lip Filler Behaves
Injectors talk about soft gels and structured gels, but the difference comes down to measurable rheology. Here is what G prime actually means, why it matters more in lips than almost anywhere else on the face, and how to use it when comparing products.
By Fitzgerald Hanlon · August 7, 2026 · 5 min read







